Improvement in steam-engines



mos NEUERT.

lmproveme nt in Steam'Engines.

No. 120,661. w Patented Nov. 7 ,-1s-7 1 UNITED STATES PATENT ()FFICE.

JACOB NEUERT, OF SANDUSKY, OHIO.

IMPROVEMENT IN STEAM-ENGINES.

Specification forming part of Letters Patent No. 120,661, dated November'7, 1871.

ing had to the accompanying drawing and to the letters of referencemarked thereon making a part of this specification.

The object of this invention is to make a cutoff valve for steam-engineswhich shall be simple, comparatively cheap, and easily adjusted.

. The invention consists in applying to the back of the ordinaryslide-valve a second valve or cut-off valve of triangular shape, whichalter-. nately covers and uncovers corresponding an gular ports throughthe back of the slide-valve, and also the manner of regulating it, ashereinafter described.

In the accompanying drawing, Figure 1 represents a plan or top view ofsteamchest with cover removed, showing my invention. Fig. 2 across-section taken in the line x 00.

Similar letters of reference indicate like parts in the several figures.

A represents the steam-chest of the cylinder of a steam-engineconstructed in the ordinary manner, and of any desirable shape and size.Into this steanrchest is fitted the slide-valve B, which alternatelycovers and uncovers the ports 0 .0 as is common in steam-engines. On theupper surface or back of the valve B are cast two raised faces, D Dthrough which are formed the angular ports E E Resting upon said raisedsurfaces D D is a second or cut-off valve, F, which slides across saidsurface by the action of an eccentric or otherwise. This cut-off valvehas bearing-surfaces a a of the same angular shape as theports E E andhaving also bearingsurfaces 1) b, which bear or slide upon theadjustable surface G, as shown in Fig. 1. This bearing surface G is ofpeculiar construction, in that upon its lower side are formed twowedges, 0 0, the angular faces of which rest upon the angular faces ofthe corresponding wedges d 01. Now, as will be readily seen, when steamis admitted to the steam-chest A, it will pass into the port E, andthence through the valve B, and through the ports O G to the cylinder,and so on alternately through the ports E E, as they are uncovered bythe valve F as it is moved by the action of an eccentric, the exhauststeam of the engine passing under the valve B, and so.

outward, as in an ordinary steam-engine. It is obvious that if the areasof the ports E E are contracted, less steam will be admitted to thecylinder in the manner just described,and a great saving be effectedthereby. Therefore, to effect this, the valve F may be so adjusted aswill permit the angular edges thereof to lap more or less, or entirelyover the ports E E and this adjustment is effected by means of thewedges d d, which are so constructed that they may be moved horizontallyby means of the lever f, or by any other desired means; for, as saidwedges cl d are so moved, their under surface sliding against the fixedside of the steamchest, the valve F will be raised more or less throughthe action of the wedges d d, and thus allow the inclined edges of saidvalve to lap over the ports E E and the lower wedges d d may beadjusted, if necessary, to entirely out off the steam to the cylinder atany part of the stroke it is wished, the adjustment being fixed inposition by the set-screw 0'.

Instead of operating the wedges by means of a lever, f, they may beconnected in any desirable manner with the regulator or governor of thesteam-engine, and in this way an excellent variable cut-oft is bad,without the use of complicated and expensive machinery, such as isgenerally employed to produce this result.

I do not wish to confine myself to any particular construction of thecut-off valve above described, or its means of application but -What Iclaim as new, and desire to secure by Letters Patent, is-

1. An adjustable cut-ofi' valve, F, of angular shape, sliding upon theback of a slide valve, B, to alternately cover and uncover ports E Emade at corresponding angles in said slide valve, substantially as andfor the purpose specified.

2. The bearing-surface Gr, having inclined or angular faces 0 c, incombination with the corresponding angular faces at 01, substantially asand for the purpose set forth. I

3. The inclines or wedges c c and d d, for adjustment of the valve F, asand for the purpose described, when said wedges d d are operated by afixed lever or governor.

JACOB NEUERT.

Witnesses Louis TRAUB,

JACOB BAUBAGH. (150)

